Melatonin delays yellowing of broccoli during storage by regulating chlorophyll catabolism and maintaining chloroplast ultrastructure

Wu, Chenghao; Cao, Shifeng; Xie, Keqin; Chi, Zongyu; Wang, Jing; Wang, Hongfei; Wei, Yingying; Shao, Xingfeng; Zhang, Chundan; Xu, Feng; Gao, Haiyan

doi:10.1016/j.postharvbio.2020.111378

Cited by 92 publications

(43 citation statements)

References 38 publications

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“…The decrease in chlorophyll content in green asparagus was consistent with the Δ E results. Moreover, this finding is in agreement with that of Wu et al [ 22 ], Miao et al [ 44 ], and Tan et al [ 20 ], who reported a delay in chlorophyll degradation in broccoli florets and Chinese flowering cabbage leaves after melatonin treatment.…”

Section: Resultssupporting

confidence: 93%

“…Many studies have recently reported that treatment of fruits and vegetables with melatonin can improve quality and shelf life. For example, melatonin treatment improved tomato quality [ 17 ], reduced decay and maintained quality in strawberries [ 18 ], delayed senescence and reduced chilling injury in peaches [ 16 ], decreased physiological deterioration of cassava [ 19 ], retarded lignification of bamboo shoots [ 7 ], delayed leaf senescence and chlorophyll degradation in Chinese flowering cabbage [ 20 ], increased the chilling tolerance of green bell pepper [ 21 ], and delayed chlorophyll degradation in broccoli, thereby extending its shelf life [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

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Exogenous Melatonin Reduces Lignification and Retains Quality of Green Asparagus (Asparagus officinalis L.)

Boonsiriwit

Lee

Kim

et al. 2021

Foods

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Asparagus (Asparagus officinalis L.) is highly perishable because of its high respiration rate, which continues after harvesting and leads to weight loss, increased hardness, color change, and limited shelf life. Melatonin is an indoleamine that plays an important role in abiotic stress. This study was designed to investigate the effects of melatonin on the quality attributes of green asparagus during cold storage. Green asparagus was soaked in a melatonin solution (50, 100, and 200 μM) for 30 min and then stored at 4 °C under 90% relative humidity for 25 days. The results indicated that melatonin treatment delayed the post-harvest senescence of asparagus and maintained high chlorophyll and vitamin C levels. Melatonin treatment hindered phenylalanine ammonia-lyase and peroxidase activities and reduced lignin content, thereby delaying the increase in firmness. Moreover, melatonin treatment enhanced catalase and superoxide dismutase activities, leading to reduced hydrogen peroxide content. These results indicate that melatonin treatment can be used to maintain the post-harvest quality and prolong the shelf life of green asparagus.

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Exogenous Melatonin Reduces Lignification and Retains Quality of Green Asparagus (Asparagus officinalis L.)

Boonsiriwit

Lee

Kim

et al. 2021

Foods

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“…Under drought stress, the chloroplasts in melatonin-treated plants showed complete and clear edges, which cling to the cell wall [ 38 ]. Chloroplasts in melatonin-treated broccoli florets maintain a well-developed membrane system and the matrix layer of thylakoidsis was visible and arranged regularly [ 39 ], indicating that melatonin could promote the stress tolerance of chloroplasts [ 40 ]. In the present study, melatonin pretreatment alleviated the damage caused by low temperatures to the chloroplasts in the coleoptile, which should be beneficial to seed germination.…”

Section: Discussionmentioning

confidence: 99%

Induction of Low Temperature Tolerance in Wheat by Pre-Soaking and Parental Treatment with Melatonin

et al. 2021

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Low temperatures seriously depress germination and seedling establishment in wheat and it is of great significance to explore approaches to improve wheat tolerance to low temperatures. In this study, the effects of seed pre-soaking and parental treatment with melatonin on seed germination and low temperature tolerance during the early growing stage in wheat were studied. The results showed that pre-soaking with melatonin increased the germination rate, improved antioxidant capacity and accelerated starch degradation under low temperature, which alleviated low temperature-induced damage to the chloroplasts in coleoptiles of wheat seedlings. Parental melatonin treatment during grain filling stage significantly decreased the grain weight. Seeds from parental melatonin-treated plants showed higher germination rates and higher antioxidant enzyme activity than the control seeds under low temperature. In addition, parental treatment with melatonin modulated the activities of carbohydrate metabolism enzymes, which contributes to enhanced low temperature tolerance in wheat offspring. It was suggested that both seed pre-soaking and parental treatment with melatonin could be the effective approaches for low temperature tolerance induction in wheat.

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“…Senescence associated genes (SAG), NAC-like (NAP2), and senescence-inducible chloroplast stay-green protein 1 (SGR1) expression levels are increased at the onset of senescence, while expression levels of photosynthesis related genes and chlorophyll biosynthesis related genes are downregulated [ 2 , 3 ]. Due to the negative effects of chlorophyll catabolism enzymes, especially pheophytin pheophorbide hydrolyase (PPH), pheophobide a oxygenase (PAO), chlorophyll a reductase (HCAR), non-yellow coloring 1 (NYC1), and NYC1-like proteins (NOL) result in leaf senescence showing leaf yellowing [ 4 , 5 ]. Transcriptions of chlorophyll catabolism genes are directly relevant to the severity of environmental factors-induced leaf senescence in plants [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Characterization of SlBAG Genes from Solanum lycopersicum and Its Function in Response to Dark-Induced Leaf Senescence

Wang

Jahan

et al. 2021

Plants

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The Bcl-2-associated athanogene (BAG) family is a group of evolutionarily conserved cochaperones involved in diverse cellular functions. Here, ten putative SlBAG genes were identified in tomato. SlBAG2 and SlBAG5b have the same gene structure and conserved domains, along with highly similar identity to their homologs in Arabidopsis thaliana, Oryza sativa, and Triticum aestivum. The qPCR data showed that BAG2 and BAG5b were highly expressed in stems and flowers. Moreover, both genes were differentially expressed under diverse abiotic stimuli, including cold stress, heat stress, salt treatment, and UV irradiation, and treatments with phytohormones, namely, ABA, SA, MeJA, and ETH. Subcellular localization showed that SlBAG2 and SlBAG5b were located in the cell membrane and nucleus. To elucidate the functions in leaf senescence of BAG2 and BAG5b, the full-length CDSs of BAG2 and BAG5b were cloned, and transgenic tomatoes were developed. Compared with WT plants, those overexpressing BAG2 and BAG5b had significantly increased chlorophyll contents, chlorophyll fluorescence parameters and photosynthetic rates but obviously decreased ROS levels, chlorophyll degradation and leaf senescence related gene expression under dark stress. Conclusively, overexpression SlBAG2 and SlBAG5b could improve the tolerance of tomato leaves to dark stress and delay leaf senescence.

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Melatonin delays yellowing of broccoli during storage by regulating chlorophyll catabolism and maintaining chloroplast ultrastructure

Cited by 92 publications

References 38 publications

Exogenous Melatonin Reduces Lignification and Retains Quality of Green Asparagus (Asparagus officinalis L.)

Exogenous Melatonin Reduces Lignification and Retains Quality of Green Asparagus (Asparagus officinalis L.)

Induction of Low Temperature Tolerance in Wheat by Pre-Soaking and Parental Treatment with Melatonin

Characterization of SlBAG Genes from Solanum lycopersicum and Its Function in Response to Dark-Induced Leaf Senescence

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